Oil burner



F. E. HERR OIL BURNER Aug. 25, 1931.

3 Sheets-Sheet 1 Filed March 1'7, 1950 ATTORNEY F. E. HERR OIL BURNER Aug. 25, 1931.

Filed March 17, 1930 3 Sheets-Sheet 2 @HHUWW INVENTOR {16 13 677 MVQ' ATTORNEY Aug. 25, 1931. F. E. HERR OIL BURNER Filed March 1'7; 1950 s SheetsSheet s INVENTOR 5; 155977 ATTORNEY Patented Aug. 25, 1931 FRANK E. HERB, OF LANCASTER, PENNSYLVANIA.

OIL BURNER Application filed-March 17, 1936, Serial No.

This invention relates to improvements in 011 burners, and 1t conslsts of the constructions, combinations and arrangements here- 1n described and claimed.

16 One of the outstanding objects of the invention is to'provide an oil burner in which all of the elements essential to the pumping of the oil from a storage tank, supplying the air, producin the mixture and guarding against both ooding. and excessive air pressures are combined in one unit which can be allocated as a unit in assembling the oil burner without disassembling,- distributing or otherwise afi'ecting any of the foregoing elements. 7 Another object of the invention is to provide a unitary control tank in which the foregoin elements are assembled, another outstan ing purpose being the elimination of allpiping between the elements with the consequent elimination of air and oil leaks and the absence. of friction which would be engendered by short bends if piping were used, to the ultimate ends of simplicity in design and construction, and economy with a marked increase of 'efiiciency inoperation.

A further object of'the' invention is to improve the cover of the control tank to the extent of incorporating in it both the necessary air and oil conduits as well as making it the mounting for a number of the principal valves.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings, 1n which':'

Figure 1 is a plan view of the improved oil burner assemblage in which the improved control tank is'the outstanding feature.

Figure 2 is a plan view of the control tank from which the cover has been removed.

Figure 3 is a cross-section taken on the line 3.3 of Fi ure 1.

Figure 4 is a ongitudinal section taken on the line 4-4 of Figure 1.

Figure 5 is a longitudinal section taken on the line 55 of Figure 1.

Figure 6 is a cross-section taken on the line 66 of Figure 1.

Figure 7 is a detail cross section taken on divides the control tank into a I conducted by means of 438,605, and in Canada September 26, 1929.

the line,-'77 of Figure 1, particularly illustrating the location of the air conduit in reference to the air and oil suction valve.

Figure 8 is a cross section taken on the line 8-8 of Figure 7, illustrating how the 88 air and oil conduits join at the foregoing valve. v

This invention is an improvement on an oil burner disclosed in an application for United States giatent filed January 19, 1929 b F. E. Herr, erialNo. 333,622 and is based tfirectly on an application filed by F. E. Herr in Canada September 26, 1929, Serial No. 355,702. The features especially emphasized in the instant application are the cover of the control tank and the air and oil valve which coacts with certain air and oil conduits incorporated in the cover for the purpose of regulating these constituents.

Figure 1 illustrates a burner a paratus of which the invention is a part whic comprises the following:A base 1, electric'motor 2, fan or blower 3, burner 4 and control tank 5.

In the latter a shaft 6 (Fig. 1) is the common driver of the fan 3 and the rotor 7 (Fig. 4) of a pump 8 formed within the tan 5. The housing 9 of this pump is an integral'casting witih 1):he body 10 of the control tank (Figs. 3 an 4 A partition 11 (Figs. 2 and 5), also cast 30 integrally with the housing 9 of the body 10 primary or pumping chamber 12 and a secondary or air and oil chamber 13. It is in the latter that the constituents of the combustible fluid are 35 finally assembled and from which they are a spray pipe 14 (Fig.

1) to the burner 4. This may be any own burner but particularly either the burner of F. E. Herr, disclosed 1n an application filed August 9, 1928, Serial No. 298,568 or in an application filed March 10, 1930, Serial No.

Situated in the primar ber 12 is a manifold 15 Figs. 2, 3, 5 and 6) which has connection at one end with the intake 16 of the ump 8 (Figs. 2 and 6). The ma'or part of the mani old is in the form of a U {Figs 3 and 6), the point of entry 17 being situated well above the oil level in the charm or pumping ob amthe manifold in the primary chamber 12 is be. a

127 of the valve are cast integrally discharged at the pipe 19 into the secondary chamber 13. The ischarge will be in the form of a mixture, but the constituents will separate in the chamber 13 so that there will stratum of oil (Figs. 3 pnd 6) and a stratum of air above it.

The constituents are again mixed by a triple valve 20 of which the' valves 21, 22

actually accomplish the mixing of the air and oil. The third valve 23 is a relief valve which controls the escape of air from the secondary chamber 13 under excessive pressure. The tri 1e valve is the special sub ect of a United gtates ap lication filed by F. E. Herr, March 17, 1930, rial No. 436,606.

Oil is pumped into the primary or pumping chamber 12 in the following manner and it is in this connection that the description of the s cific invention occurs :-An oil pipe 24 (Fig. 1) leads from an oil storage tank (not shown) to a point of connection with the conduit 25 of an air and oil suction valve 26 (Fig. 5). Both the conduit and the casingwith the cover 28 of the control tank 5. The casing 27 is an upstanding cylinder (Figs. 3 an 5) which is in conduit 25 through an oil port 29 (Figs. 5 and 8), and with the primary chamber 12. It has a screw or other ca 30 by which access to the interior may be ha from the top.

A port 31 (Figs. 3, 5 and 8) represents the terminal at the valve 26 of an air conduit 32 which is cast integrally with the cover 28. The casting of the air conduit is in common with the casing 27 and a block 33 (Figs. 1, 3 and 4) by which the triple valve 20 is carried. This air conduit has a hole 34 at which atmospheric air is admitted prior to introduction mto the primar chamber 12 est a valve manager 35 whic is reciprocabl e in the casm e air conduit 32 is also the place where air under excessive pressure in the secondary chamber 13 is discharged. The dischar e occurs'past the relief valve 23 as already in icated.- This relief valve consists principally of a ball 36 pressed toward its seat upon an air opening 37 by a spring 38. The tension of the sprin 's adjustable so that the ball 36 will respon to any desired pressure. A

It is important to note that the air conduit 32 has the s ial purpose of preventing the collection 0 an oil film on top of the cover 28. The air escaping from the chamber 13 always direct communication with the carries particles of oil in suspension. If the air were permitted ,to escape directly to atmosphere this oil would collect around the escape opening and on top of the cover. But by causing it to discharge into the conduit 32 all suspended oil will settle on the bottom of the conduit whence it is automatically drawn back into the chamber 12 by the vacuum formed in that chamber, and acts as an oil seal on the walls of the valve member 35. This member fits free in the casing 27 and must have the oil seal to prevent air leakage.

Any oil collecting in the conduit 32 will run toward the casing 27 where it will lubricate the valve member 35 and ultimately drip into the chamber 12. The use of the air conduit 32 avoids an more or less troublesome arraingement o pigng for accomplishing the same purpose. the air conduit within the cover 28 a direct return of oil from thetriple valve 20 to the valve 26 is afforded, the fprincipal advantage being the prevention 0 oil leakage or the disseminatlon of oil fumes throughout the building.

Reverting now to the valve member 35 it is to be observed that this comprises a sleeve (Figs. 3, 5 and 8) which has an oil inlet 39, an oil outlet 40 and an air inlet 41. The oil inlet 39 is registrable with the oil ort 29 and it is at this point where oil is admitted to the rimary chamber 12 by way of the outlet 40.

0 air inlet 41 is registrable with the port 31 and it is at this point that air is admitfetd :8 the chamber 12 also by way of the out- The valve member=35 has a stem 42 depending from the otherwise solid bottom at which stem the link 43 of a primary float 44 is cohnected through the medium of the rocker 45 v of the latter. The rocker is pivotally attached toa sup ort rod 46 depending from the'cove'r '28. bus far it will be seen that the removal of the cover will expose the working parts of the valve 26 to view so that any necessary inspection or repair may be made with the utmost care.

An approximately normal working posi tion of the fioat 44 occurs when the level of oil in the primary chamber 12 is sufiiciently high. to withdraw the valve member 35 from the casing 27 until the solid upper portion of the sleeve covers the oil port 29 and uncovers the air ort 31 at the air inlet 41. Lowering of the oat 44 from the position stated will cause coverin of the air port and uncovering of the oi port. The adjacent ends of the inlets 39 and 41 are approximatel on a line with each other so that after the oat 44 once assumes the foregoing normal working position there will be but a slight variation of the float in either direction before there will be an admission of either air or oil depending upon the articular need. 7 he level 0 oil in thesecondary chamber y virtue of incorporating 85 through the'medium of a secondary float 49.

The pipe 48 has communication with a crossover passage 50 (Figs. 1 and 6). This passage is cast. integrally with the cover 28. One end has a boss 51 (Fig. 6) in which the oil pipe 48 is fitted to establish its communication withthe secondary chamber 13. The other end of the passage has an outlet 52 into the primary chamber 12. The rising of the oil in the chamber 13 to an excessively high level causes the opening jof the valve 47 whereupon the pressure of air drives the oil through the pipe 48 and cross-over passage 50 into the chamber 12 without disturbing the atmespheric condition within the latter. Again it is to be observed that this particular phase in the control of oil is accomplished without adding any external pipes to the control tank. The cross-over passage is incorporated in the'cover 28 and since no external joint occurs it follows that there can be no leakage of oil around the cross-over passage.

It can now be understood that the action of the pump 8 draws in oil and air separately at the openings 39 and 41 (Fig. 5) an that these constituents are transferred tothe secondary chamber 13 as a mixture by way of the mani fold 15 and discharge pipe 19 (Fig. 2). The

level of oil in the prlmary chamber 12 as well as the supply of air is subject to automatic control by the float 44 (Fig. 5) and the valve member 35.

On a similar principle, the level of oil in the secondary chamber 13 is automatically controlled by the float 49 (Fig. 6)'whi1e air under excessive ressure is released from the secondary cham or by the relief valve 23 (Fig. 3). 7

These operations are not desired to be emphasized 1n this application since the cover 28 is the important factor. It has been brought out already that the conduits 25 and 32 as well as the cross-over passage 50 are permanently incorporated in the cover so as.

to be inseparable therefrom. There are no unnecessary joints at which oil leakage can occur, the only necessary pipe joint occurring where the spray pipe 14 has connection with the triple valve 20 and the feed pipe 24 is connected at one end of the conduit 25.

The two floats 44, 49 depend from the cover (Figs. 3 and 6), hence it followsthat the removal of the cover will not only permit an unobstructed view of the interior of the tank body 10.but alsorender the working parts of the various inspection or repairs as may be needed.

While the construction and arrangement of the improved oil burner, is that of a genvalves accessible for such erally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the clalms.

claim 1. A control tank having a partition dividing it into primary and secondary chambers, a cover for the tank serving both chambers in common, a pipe having a relief valve for relieving the secondary chamber of excessive fluid under pressure, and a cross-over passage incorporated in the cover with the inlet of which the pipe is connected, said passage having an outlet discharging into the primary chamber.

2. A control tank having a partition dividing it into primary and secondary chambers each to contain air and oil, a cover for the tank serving in common for both chambers,-a cross-over passage incorporated in the cover having an inlet at the secondary chamber and an outlet at the primary chamber, a pipe depending from the inlet into the oil in the secondary chamber, a relief valve in the pipe for opening and closing the crossover passage to the secondary chamber, and oil level-operated means in connection with the valve for setting its open and closed positions.

3 Acontrol tank having a partition dividing 1t into primary and secondary air and oil chambers, a cover for the tank serving in common for both chambers, a valve casing embodied in the cover having a movable valve member by the action of which the flow of air and oil of the primary chamber is controlled,

cover for the chamber having an air opening communicating with the secondary chamber, a valve block on the cover carrying a relief ball valve arranged to seaton the opening, a valve member associated with the primary chamber for controlling the admission of air and o1 l thereto, a casing incorporated in the cover in which said valve member is movable, and a conduit also incor rated in the cover connecting the block and gaid casing, having a hole for the dischar e of air escaping past the relief ball valve but serving to confine condensed oil and conduct it to the casing for the lubrication thereof and sealing of the valve member.

5. In combination with a control tank di for the relief of r its operatingm'eans depending in element to constitute the cover a separa 1e unit; en air and oil suction valve and from the an oil relief cover in the primary chamber,

" depending valve and its operating means from the cover in the air relief valveassocieted with the secondary chamber, a casing in which the suction valve is operable, separate conduits leading from the casing one being for the oil'supply the other joining the air relief valve, and a cross-over passage establishing the oil relief valve and the primary chamber.

FRANK E. HERB.

secondary chamber, an Q communication between 

